|On-Board Chemical Propulsion Technology - Reed, Brian D|
On-board propulsion functions include orbit insertion, orbit maintenance, constellation maintenance, precision positioning, in-space maneuvering, de-orbiting, vehicle reaction control, planetary retro, and planetary descent/ascent. This paper discusses on-board chemical propulsion technology, including bipropellants, monopropellants, and micropropulsion. Bipropellant propulsion has focused on maximizing the performance of Earth storable propellants by using high-temperature, oxidation-resistant ...
Keywords: ASTRONAUTS; EDUCATION; NASA PROGRAMS
|Overview of Propulsion Systems for a Mars Aircraft - Colozza, Anthony J.|
The capabilities and performance of an aircraft depends greatly on the ability of the propulsion system to provide thrust. Since the beginning of powered flight, performance has increased in step with advancements in aircraft propulsion systems. These advances in technology from combustion engines to jets and rockets have enabled aircraft to exploit our atmospheric environment and fly at altitudes near the Earth's surface to near orbit at speeds ranging from hovering to several times the speed o...
Keywords: ACTIVE CONTROL; HEAT PIPES; OPERATING TEMPERATURE; TEMPERATURE CONTROL; EVAPORATORS; CONDENSERS (LIQUEFIERS); COMBUSTION CHAMBERS; HEATING; LOADS (FORCES)
|Electrolysis Propulsion for Spacecraft Applications - deGroot, Wim A.|
Electrolysis propulsion has been recognized over the last several decades as a viable option to meet many satellite and spacecraft propulsion requirements. This technology, however, was never used for in-space missions. In the same time frame, water based fuel cells have flown in a number of missions. These systems have many components similar to electrolysis propulsion systems. Recent advances in component technology include: lightweight tankage, water vapor feed electrolysis, fuel cell technol...
Keywords: UNSTEADY FLOW; BLUFF BODIES; PERIODIC VARIATIONS; ANGLE OF ATTACK; SUBSONIC WIND TUNNELS; RECTANGULAR WINGS; FLOW DISTRIBUTION; SEPARATED FLOW; FREQUENCIES; AERODYNAMIC STALLING; PRESSURE OSCILLATIONS